A Study On Electromagnetic Interference Based On Electromagnetic Topology For Multiconductor Line Networks

As the development of modern information technology, the system structures are gettingmore and more complex, the equipments in the system are also under more serious interference. In1974, the electromagnetic topology theory proposed by C.E.Baum and then the BLT Equation ofelectromagnetic topology theory deduced by C.E.Baum, T.K.Liu and F.M.Tesche came to beimportant methods to solve the electromagnetic interference problems of complex systems. Thispaper focuses on electromagnetic interference of complex multicondoctor line networks, the mainwork can be divided into the following several parts:In the first part of the thesis, the method of building models for simulating various systemstructures and signal types that disturbed the electronic system were analyzed.This paper describedthe electromagnetic topology theory, and constructed electromagnetic topology graphs for complexsystems, so as to describe the process of energy transfering between systems, then according totaking a system under electromagnetic interference for example，this paper introduced how toconstruct topology graphs of electromagnetic interference.In the second part of the thesis, the deduction of BLT Equation of multiconductors underdifferent excitation sources was introduced systematically, then this paper used the FourierTransform to change frequency domain responses into time domain responses in order to analyzethe electromagnetic interference of the system.In the third part of the thesis, in order to analyze electromagnetic interference problems ofcomplex line networks, this paper proposed and elaborated a method of ranking the super matrixeswhen analyzing the electromagnetic interference of multiconductor line networks, and a method ofconstructing BLT Equation for line networks. BLT Equation was applied to analyze morecomplicated problems.Finally, by taking a multiconductor transmission line model and a line network model asexamples, this paper analyzed the topology graph of each model, gave the general steps ofconstructing BLT Equation for line networks,then gave the super matrixes of each network.At lastall response of nodes in the topology graph were calculated.